一种基于声谱图的冲击声特征提取方法

Method of impact sound feature extraction based on spectrogram

提出一种基于声谱图的特征提取方法,获取冲击声的声谱图,预处理后将其转换为伪彩色图,提高声谱图细节表现力,进而提取局部区域k阶矩作为特征;将该特征的识别效果与MFCC等传统特征进行了对比和分析。实验结果表明,该方法对相似板材冲击声有较好的识别效果,并且具有较好的噪声鲁棒性。

A new method of feature extraction based on spectrogram is proposed. With the method,the spectrogram of impact sound can be obtained,and converted into pseudocolor image after preprocessing to improve the expressive force spectrogram details and realize extraction of kth moment in partial region as the feature. The recognition result of the proposed features,MFCCs and other traditional features are compared and analyzed. The experimental results show that the proposed method can accurately distinguish impact sound of similar sheet material and has nice noise robustness.